*UPDATE* 12/18 3 p.m. – Police say Bickerstaff was found safe in Manchester, New Hampshire, and that the Silver Alert has been canceled.

NEWTON, N.H. — Police are asking the public for help to find a 69-year-old man who has ALS and is primarily confined to a scooter. 

Ricky Bickerstaff of Newton, N.H. was last seen Monday morning, Dec. 17 in Newton.

Police believe Bickerstaff may be driving his black 2017 Dodge Caravan SXT with N.H. disabled veteran plates 3672. Bickerstaff's van has tinted windows and is equipped with a wheelchair ramp on the passenger's side. 

Bickerstaff was last seen wearing a faded silver New England Patriots jacket. 

Police say his speech is difficult to understand. 

Anyone with information about Bickerstaff's whereabouts is asked to call (603) 382-5586.